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KMID : 0869120000020020081
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기초간호자연과학회지
2000 Volume.2 No. 2 p.81 ~ p.89
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The Nocturnal Changes of Plasma Melatonin Concentrations in Night Shift Workers : Comparison of the Clockwise and Counterclockwise Rotational Shift.
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민순/Soon Min
김미승*/임욱빈*/Mi Seung Kim*/Wook Bin Im*
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Abstract
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To determine the optimal rotational shift system, the effect of the direction of the rotational work shifting on the nocturnal rhythm of plasma melatonin were investigated in nursing students. Two groups of nine volunteers participated as
experimental
subjects, and two nursing students participated as a control group. The directions of the rotational work shift were as follows: CW(clockwise)-shift were retated in the direction of day shift(3 days), evening shift(3 days), off duty(1 day) and
night
shift(5 days), and CCW(conuterclockwise)-shift were done in the reverse direction. Plasma melationin concentrations was measured by radioimmunoassay. The results were as follows : The plasma melationin levels were kept low at night and in the
following
morning in the CW night shift workers, whereas the level started to increase at 05 : 00 hr in two workers of four CCW shift workers. These result suggests that the shift rotation in the CW direction is more acceptable in terms of the adaptation
of
hormonal rhythms. These results indicate that the CCW rotation of shift work is somewhat better than CCW rotation for the adaptation to shift work on hormonal aspects in nurses.
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KEYWORD
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